If the reports are true, Jessica Simpson and fiance Eric Johnson, seen here a year ago with a pre-debut Maxwell, may be on their way to having a set of Irish twins. USA TODAY's Olivia Barker takes a look at other celebs who, when it came to making babies, took the idea of a pregnant pause quite literally. Mike Coppola, Getty Images

Sean Preston was likely still in a crib, let alone diapers, when mom Britney Spears gave birth to his little brother, Jayden James, on Sept. 12, 2006, two days shy of Sean's first birthday. Here, mom and dad Kevin Federline walk the red carpet between the two blessed events, in February 2006. Chris Polk, AP

Tori Spelling and Dean McDermott have twice gone the cradle-to-cradle course: first with Liam Aaron (born March 13, 2007)
and Stella Doreen (June 9, 2008) and then with Hattie Margaret (Oct. 10, 2011) and Finn Davey (Aug. 30, 2012). Here, the proud parents do the requisite red-carpet bump rub with an in utero Hattie. Michael Buckner, Getty Images

Charlie Sheen and Denise Richards, here pregnant with Sam in 2004, returned to the family way soon after Sam's birth on March 9: Little sister Lola was born June 1, 2005. Kevin Winter, Getty Images

Kim Zolciak and NFLer Kroy Biermann weren't tardy for the maternity ward after Kroy Jr. was born May 30, 2011: Little brother Kash Kade came along Aug. 15 this year. Peter Kramer, AP

Rebecca Gayheart and Eric Dane's first daughter, Billie, was born a month after this photo was shot, on March 3, 2010. Daughter Georgia followed soon after, on Dec. 28, 2011. Gabriel Bouys, AFP/Getty Images

Lily Allen was pregnant on her June 11, 2011, wedding day: Daughter Ethel was born Nov. 25. This July, the singer confirmed she and her husband, painter Sam Cooper, were due with No. 2. Ben Birchall, AP

Donald Trump Jr. must have been fired up about expanding his brood with wife Vanessa. The pair welcomed their fourth child, son Spencer (still a bun in the oven in this picture), on Oct. 21, 2012, a year and change after Tristan was born on Oct. 2, 2011. Mark Von Holden, WireImage